Chef Server, rabbitMQ Error: {cannot_connect_to

Chef Server, rabbitMQ Error: {cannot_connect_to_epmd,"herman-desktop",address}

I had my Chef server running fine until I changed the static IP address of my virtual machine.
When I tried to upload by data bag from my workstation it was failing with the below error

ERROR: internal server error
Response: Connection failed - user: chef
While investigating I found that rabbitMQ service was not started and when I tried to restart the service I got the below error.

Starting rabbitmq-server: FAILED - check /var/log/rabbitmq/startup_log, _err
rabbitmq-server.

...further investigation  I found that in /etc/hosts file there was an entry of my old

static ip address against chef server

 So I changed it to localhost i.e 127.0.0.1

...then i was able to restart rabbitMQ service and also was able to upload data bags into

chef server

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